Procaine urea



Patented Jan. 30, 1951 7 UNITED STATES PATENT OFFICE" PRGCAINE UREA Ralph N. Lulek, Rosebank, N. Y., assignor to Heyden Chemical Corporation, New York, N. Y., a. corporation of Delaware No Drawing. Application December 8, 1948, Serial No. 64,241

4 Claims. (Cl. 260-472) 1 2 My inven on r es p c y to procaine, of procaine urea. The product obtained melts at or novocaine, derivatives and the process of proabout 135136 C. ducing the same. It will be understood, however, that the pro- An object of my invention is to produce such portions of pyridine and ethyl acetate can vary derivatives, also more particularly to obtain 5 through any desired wide limits. Instead of ethyl modified forms of the well known drug noVO- acetate I may substitute an other suitable solcaine, such as the hitherto unknown procaine vents, as for instance acetone, isopropylacetate, urea (C13l-I19O2N2)2CO, which is useful also in etc. Also, the temperature may be varied bemaking procaine urea salicylate, a modified form tween 15 and 75 C., as desired, for the reaction. 0f Said d HOVOCainB p d g a S ce) 0f Instead of pyridineImay substitute, for example, salicylic acid used in treating ulcers, Therapeuquinoline or dimethyl aniline,

tics, Materia Medica and Pharmacy, Potter, 13th In making procaine urea salicylate, which may 1917 page Blakistons 5 be expressed as (C13H1902N2)2CO(C7H603)2, I Phila, Pa. The object is, also, to provide new may proceed as follows for example.

Chemlcal compounds and to advance the art 15 A solution of 13.8 grams of salicylic acid in 50 accordingly.

grams of ethanol, having a strength of 95%, 1s Whne my mventlon may ham many dlfierent added to an ethanol solution of 25 grams of said embodiments and may be carried out in many different ways, for the purpose of illustration I pmcame urea contalmng 30 grams of ethanol of have described hereinafter only certain examples 95% th, w the alcohol, P thereof moved by d1st1l1ation the 011 remaining sol1d1fies example, in making procaine urea on standing. This solid is recrystallized from ether-methanol comprising 200 cc. of ether and (C13I'I19O2N2)2CO 200 cc. of methanol and then air dried. The yield which may be expressed as of procaine urea salicylate is 91.5%, based on the which is di-(B-diethylamino) ethyl ester of 4,4- procaine urea originally present. It melts at dicarboxy diphenyl urea or 4,4-di-(c-diethylabout 102105 C.

amino) carbethoxy diphenyl urea, I may proceed The proportions of the ethanol as above can be as follows; varied within wide limits, as desired. Also, in-

Into a mixture of 1 liter of a tertiary base, such stead of ethanol I may substitute other alcohols,

as pyridine, 1 liter of ethyl acetate, and 512 grams su h s i p panol, -pr p nd in ad ture is preferably held between 35 and 40 C. 50 2. The process which comprises reacting at a during the addition. Then the mixture is chilled temperature between 15 and 75 0., procaine hyof procaine hydrochloride, that is to say novoof the ether-methanol solution I may substitute oaine hydrochloride substantiall any other ether-alcohol mixture as a solvent. NH2C c O2CH2OH2N(C2H5)2HO1 While I have described my invention above in l 0 detail it will be understood that the same may be which is very soluble in water and used as a subi d th t departing f om t spirit of my stitute for cocaine and as a local anaesthetic, i v ti Martin, Organic Chemistry, 3rd ed., 1917, page I l i 604, Appleton &' Compa y, New York, Thorpe, 1. A new chemical compound 4,4J-di-(c-di- I pp- V. III, p e 718, 1 is passed 100 ethylamino) carbethoxy diphenyl urea, having the 1 grams of phosgene. The temperature of the mixfollowing f r la; l l

to 15 C. and filtered, and the solid product obdrochloride with phosgene in the presence of a tained is recrystallized three times from 90% tertiary base to form procaine urea. strength ethanol, and once from 98% strength 3. The process which comprises reacting, at

methanol, to yield of the theoretical amount about 35 to 40 (1, procaine hydrochloride with 2,539,848 r 3 4 A X phosgen in the presence of a tertiary base to REFERENCES CITED form procaine urea- The following references are of record in the 4. The process which comprises reacting, at file of this patent:

about 35 to 40 0., procaine hydrochloride with phosgene in the presence of a tertiary base to 5 UNITED STATES PATENTS form procaine urea, then chilling and filtering Number Name Date the solid product. 1,850,555 Laska et a1. Mar. 22, 1932 2,050,557 Bochmuhl et a1. Aug. 11, 1936 RALPH LULEK- 2,093,265 Coffey et a1 Sept. 14, 1937 10 2,352,691 Curtis July 4, 1944 

1. A NEW CHEMICAL COMPOUND 4,4''-DI-(B-DIETHYLAMINO) CARBETHOXY DIPHENYL UREA, HAVING THE FOLLOWING FORMULA: 